65400277063680 has 1536 divisors, whose sum is σ = 254185149254400. Its totient is φ = 15854469120000.

The previous prime is 65400277063643. The next prime is 65400277063739. The reversal of 65400277063680 is 8636077200456.

65400277063680 is a `hidden beast` number, since 6 + 5 + 4 + 0 + 0 + 277 + 0 + 6 + 368 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1536).

It is a super-2 number, since 2×65400277063680² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 93295687330 + ... + 93295688030.

Almost surely, 2^{65400277063680} is an apocalyptic number.

65400277063680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65400277063680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127092574627200).

65400277063680 is an abundant number, since it is smaller than the sum of its proper divisors (188784872190720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65400277063680 is a wasteful number, since it uses less digits than its factorization.

65400277063680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 65400277063680 in words is "sixty-five trillion, four hundred billion, two hundred seventy-seven million, sixty-three thousand, six hundred eighty".